A wiki is an unusual medium, and as such doesn't conform well to the usual book-citation formats. Wiki is not paper, so you will need to use an electronic-citation format instead. The exact format will depend upon the citation guide that you are following, but here are a few general principles to consider:

A special citation tool is available to assist you. On the left of every article, there is a "Cite this article" link. Clicking it will bring you to a listing of relevant information, as well as automatically generated citations in several styles. Note that it is still your responsibility to ensure the citation meets all requirements.

You should not cite any particular author or authors for a Wikipedia article, in general. Wikipedia is collaboratively written. However, if you do need to find the list of authors of a particular article, you can check the Page history. Authors are listed only by IP address or chosen user name; you normally cannot verify and often cannot even guess at their identities.

Your citation should normally list both the article title and Wikipedia, The Free Encyclopedia, much as you would for an article in a paper publication. Every article should be a separate citation.

Most citation styles will likely require the full article URL. You can click "Permanent link" in the toolbox at the left of this page. This lets the URL include a unique identifier such that you can tie your reference back to the exact version of the article you are referencing. It may or may not be desirable to adopt this approach, depending upon the context of your reference. This lets you show what you saw and ignore any changes made after you accessed the page. If greater brevity is desired, you can use the regular URL, or optionally just the site URL (e.g. http://en.wikipedia.org/ for an English article), because an article URL can be inferred from an article title.

The citation style may request the full date and time of the article revision you are using. If you use the permanent link feature, this may not be necessary. However, the date and time of the last revision can be found at the bottom of every page (above the copyright notice).

The following examples assume you are citing the Wikipedia article on Plagiarism, using the version that was submitted on July 22, 2004, at 10:55 UTC, and that you retrieved the article on August 10, 2004, except as otherwise noted.

Plagiarism. (2004, July 22). In Wikipedia, the free encyclopedia. Retrieved August 10, 2004, from http://en.wikipedia.org/wiki/Plagiarism

Note that in APA 5th Edition style, the following rules apply for the reference:

For reference books, which includes encyclopedias, dictionaries, and glossaries, the book title is preceded by the word In. It is not italicized, but the book title following it is.

The book title appears in sentence case. You capitalize the first word, the first word after a colon, and proper nouns.

The URL must go to the exact page that you reference.

No punctuation follows the URL.

The term or article title appears in the author position. Use sentence case for multiple-word terms or titles, where you capitalize the first word, the first word after a colon, and proper nouns.

The proper in-text citation is ("Plagiarism," 2004) for a paraphrased passage or ("Plagiarism," 2004, para. #) if you directly quote the material. Note that para. # represents the paragraph number in the page where the information appears. If there are multiple headings on the page, it is also acceptable to place the subheading and then a paragraph number within that heading.

For example, proper in-text citation for a direct quote of fewer than 40 words is:

"Plagiarism is the use of another person’s work (this could be his or her words, products or ideas) for personal advantage, without proper acknowledgment of the original work" ("Plagiarism," 2004, "Definition," para. 1).

If the quoted material is more than 40 words, use the block quote format instead.

As another example, the proper in-text citation for a paraphrased passage is:

Plagiarism is stealing the works of others ("Plagiarism," 2004).

APA Style requires that you provide a separate reference entry for each term you are citing in your paper because 1) you must provide a URL for each term that goes directly to the term, and 2) you must provide the publication date for each term separately. However, if you are discussing the "online encyclopedia" itself, not a term in the encyclopedia, you might need to reference the site itself. The proper citation of Wikipedia, the site, as referenced in APA 5th Edition Style is:

Note that MLA style calls for both the date of publication (or its latest update) and the date on which the information was retrieved. According to the most recent edition of the MLA Handbook, there is now information required about any foundation involved. Also note that many schools/institutions slightly change the syntax. Another example:

The following are examples of how to cite Wikipedia articles according to A Manual for Writers of Term Papers, Theses, and Dissertations, 6th edition, by Kate L. Turabian (Chicago: University of Chicago Press, 1996). আইএসবিএন০২২৬৮১৬২৬৫ (cloth), আইএসবিএন০২২৬৮১৬২৭৩ (paper).

Note on Turabian style: Please understand that Turabian does not have rules that cover anything like Wikipedia. These examples are based on "reading between the lines" and assimilating rules from various not-so-similar cases that Turabian does cover. If the party to which you are submitting your paper is particularly strict, you might want to find out if they have their own adaptation of Turabian that would apply in this case. Alternately, you could always consult with the party before the deadline to make sure it's acceptable.

(According to Turabian 6th edition, ¶9.8, for entries in the bibliography, "the first line of each entry is flush left, and any run over lines are indented five spaces". This presentation does not follow that rule.)

Here is an example:

See Wikipedia, Bluebook, http://en.wikipedia/wiki/Bluebook (describing history and application of the Bluebook) (as of Mar. 21, 2006, 20:50 GMT).

This format derives from Rule 18.2 of the 18th edition of the Bluebook, though the date parenthetical differs slightly. The parenthetical here is designed to specify the exact version of the article to which the author is referring, recognizing that articles can and do change often. The date and time used should correspond exactly to the latest version listed in the article's Wikipedia history page that states the proposition for which you are citing it. Use of GMT conforms to the timestamp format used in those history entries (e.g., use 24-hour notation to avoid AM/PM).